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Highest advisory severityHigh 2 vendors · 2 advisories

CVE-2026-88901

Improper Restriction of XML External Entity Reference vulnerability in Apache Camel

CVE-2026-88901: Improper Restriction of XML External Entity Reference vulnerability in Apache Camel. Not in the CISA KEV catalog.

Compare the source-linked records below. Ratings and product/version details belong to each advisory; they are not a single CVE-wide score or proof that every listed product is affected. How VulniPulse collects and checks evidence.

NVD detail CVE.org

CVE-2026-88901 at a glance

CISA KEV
Not listed (catalog checked )
Highest advisory severity
High
CVSS base score
8.2 (Apache), 8.2 (Red Hat)
Weakness
CWE-611
Fixed releases
  • Apache: 4.18.5, 4.22.1, 4.23.0
Vendor advisories
2 from Apache, Red Hat
VulniPulse record
Published · Updated

Scores, vectors, weaknesses and fixed releases are quoted from vendor advisories that cover only CVE-2026-88901; bulletin-wide values are not repeated here.

Is CVE-2026-88901 exploited?

No exploitation is reported in the sources VulniPulse tracks: CVE-2026-88901 is not in the CISA KEV catalog (checked ) and no tracked advisory for it reports exploitation. That is not proof the vulnerability cannot be exploited.

How do I fix CVE-2026-88901?

Upgrade to a fixed release named by the vendor:

  • Apache: 4.18.5, 4.22.1, 4.23.0
  • That reader resolves external general and parameter entities and loads external DTDs, and camel-smooks applied none of the parser hardening that the other Camel XML components apply. (Apache)
  • Users are recommended to upgrade to version 4.18.5, 4.22.1 or 4.23.0, which fixes the issue. (Apache)

Vendor advisory comparison

Apache

1 advisory
  • Advisory severityHigh8.2

    High [CVE-2026-88901] Improper Restriction of XML External Entity Reference vulnerability in Apache Camel

    CVE-2026-88901Source published Source updated

    Improper Restriction of XML External Entity Reference vulnerability in Apache Camel. This issue affects Apache Camel: from 4.7.0 before 4.18.5, from 4.19.0 before 4.22.1. The Smooks data format (.unmarshal().smooks(...)) and the Smooks component (smooks:) parse the incoming XML body with the reader Smooks resolves by default, which is the Woodstox SAX parser. That reader resolves external general and parameter entities and loads external DTDs, and camel-smooks applied none of the parser hardening that the other Camel XML components apply. A DOCTYPE with an external subset, or an external general entity, declared in the XML document is therefore resolved and expanded while the body is unmarshalled, and the resolved content is bound into the unmarshalled result and returned on InOut…

    Affected products in this advisory
    • Apache Camel
    Source-reported affected versions
    • 4.7.0 before 4.18.5
    • 4.19.0 before 4.22.1
    Source-reported fixed versions
    • 4.18.5
    • 4.22.1
    • 4.23.0
    Mitigation guidance
    • That reader resolves external general and parameter entities and loads external DTDs, and camel-smooks applied none of the parser hardening that the other Camel XML components apply.
    • Users are recommended to upgrade to version 4.18.5, 4.22.1 or 4.23.0, which fixes the issue.
    • Upgrade to Apache Camel 4.23.0, which fixes the issue.
    • Users on the 4.18.x LTS releases stream should upgrade to 4.18.5.

    2 more entries in the full advisory.

    Full advisory and evidenceOpen source bulletin

Red Hat

1 advisory
  • Advisory severityHigh8.2

    High [CVE-2026-88901] Information disclosure via XML external entity injection

    CVE-2026-88901Source published Source updated

    Information disclosure via XML external entity injection. Red Hat rates this important (CVSS 8.2). Weakness: CWE-611. Affected products named by the advisory: Red Hat build of Apache Camel 4 for Quarkus 3; Red Hat build of Apache Camel for Spring Boot 4.

    Related products — impact not confirmed
    • Red Hat build of Apache Camel 4 for Quarkus 3
    • Red Hat build of Apache Camel for Spring Boot 4
    Source-reported affected versions
    Affected-version details not available in this record.
    Source-reported fixed versions
    No fixed-version detail extracted. This does not mean no fix exists.
    Mitigation guidance
    No mitigation guidance extracted; consult the source.
    Full advisory and evidenceOpen source bulletin

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